Pressure-controlled valve and switch for refrigerating machines



BEST AVAXLABLE COP:

May 18 1926. 1,584,870

-J. T. LAGERGREN PRESSURE CONTROLLED VALVE .JESD SWITCH FOR REFRIGERATING MACHINE Filed Sept. 19. 1924 3 Sheets-S heet 1 In E I l i g I l INVENTOR yxm flfiy y a ATTORNEYS BEST AVAlpABLE com I 'J.T.LAGERGREN PRESSURE CONTROLLED VALVE AND b wli'cn FOR REFRIGERATING MACHINES Filed Sept. 19f 1924 3 Sheets-Sheet 2 2 Y z? V 440 55 F INVENTOR VBESTIAVAILABLE com May 18 I926. 1,584,870

,J. T.- LAGER'GREN PRF'SFYJRE CONTROLLED 1. mm SWITCH FQR IRBFEIGERATINQ MACHINES Filed Sept 19. 1924 3 Sheets-Sheet 3 ATTORNL J per zewaai na s ce li e a be'iireadilyfico ordinated with e ntioned. mechanismeFig' I section'on line. 7%7of 28 similarlto Figifilwith'tl Jonas-Q er.- masseuse,

imom? Hi controlledfmechanism; 3g 33a e1 "atposition 1 he "entar form of rnercury: switchL: V [In the dravvl' 'gs ltl lndicates acompressor equipped; with La condensing coil {11'} {and 3a;

having a power ;'circuit 14, allofj'ordinary construction'.-i I T- In "an apparatus' -of the fabove character,

especially small unitsgithe necessary cQndenj sation, is obtained by a flow ofwater'; generally metered, and it is therefore quite desirable tha "the water flow be maintainedare operated under such conditions that con-- stant supervision is impracticable, and it is therefore important thatthe flow of con- (lensing water, and the application of power 48 to the condensem-be automatically controlled.

50 body 20 chambered in-its opposite faces to form two independent. pressure chambers, one a low pressure chamber 2l and the other L a hi gh pressure. chamber 22, these chambers being preferably formed with a central boss ares-aeti eEsTAvmLAeL A fs smo Y mm s 'ms,' wo,snnrmn r xcp mcnmn courmgonmynnnsvnvanm, a cozy .Qh1chijvy llap ea v ead ng into: the 'lovvipre'ssure' chamber 21 t1 system 24;and leading into ='tagn gir ress'urechsmber 22, from the high pressuresidefof said system; is"a passage 25.

ys. cover plate 27 ,and chainla'cebya vie "plat'ei29i f The central bosses 1f 'and1-22 limit-inward movement of the v iaphragqi 26 hd'28respectively, and .out- :i rds movemen i fiisal pockets"27 and-29 formed, respectively in united by suitable I Mounted" c'o eraplate27 is a plunger 30 avihgifa; limited movement in a pocket 32 andiengaging diaphragm-26; i

Similarly mounted in" cover; plate 29 T'is a 37 carrying atanl-f interinediate point an adjustable =-temp er fscr'ew. 38- arranged in posiengaged' by the outer end of plunger 30 -=ivoted at 39 on cover plate 29 pointfwith an?",adjustable temper screw 41 arrangedtobe engaged byflthe outer end of plunger 33. "-lhejtwo'levers 3.7 and are extended in the same general direction and are of sub stan'tially the same length. Pivoted at the outerend of lever 37 is'oup 42 over 'which is threaded a'cup 43 held in any desired position of axial adjustment on cup 42 by-means of a-setscrew 44.

40 only xvhen riecessary. f Plants ofthis kind I Projected thr gh 111 4: i a r d 45 hav-.

ing a head 146 atits inner end within cup 42. A spring 47 is arranged between head 46 and cup 43; The outer end of rod 45 is pivotally' co'nnected to the free end of lever 40, the arrangement-being such that the outer ends Leta-levers 37 -and 40 are connected a diaphragm. 28 held in 1 232mm the low. pressure side of I iSOS'er'ed' by a diaphragm 26 s azm'nerfend with ahead 31 J I Mplunger -33 hayin ahead 34"at i'tsfinner end, ir -PQ'M'W pivoted: t 36foncover plate 27 is a lever 4,

isa lever- 40 'providedatan intermediate through the'medium of spring 47, the eflectiveness-of which may bdadjusted-by an adjustnient of cup 43 on cup 42.

At an intermediate point 1n its length, lever 37 is provided with an adjustable temper screw 50 arranged to engage the outer .end of stem 51 of a valve52 normally urged to its seat 53 in water passage 5 by a spring ios 2o e connected atjtiattozth swing c .Any form of-electricls wiltch tive in character; andfform I present inventionin'so fa 5 .st-ruct'ion-is concerned 5 in eitherpne; of'itsjextre neg posit; ns

' electrical connection ibetweemsth into e 13, andas the motor shown in :th'evpresent 'vided with a pairof separated pins fiili an A adapted to be alter1 atelyi engaged by'a' so t eand 66 1a tswitchof thei me shown in Fig; IOmaybejgused; a the swingingsupport, 60-;ca'1-ries th 55, the arrangemeht being shchthat when' thereis et lnospheric "pressure in cl 1' a and 22' "valve 52 'will be Iclose controls flow offthe .coolingimediuhs coil 11. g Lever 40, within a limitedlrang extreme 'position, is utilized tocontrol-motor drawin is an electric.flmotor5gla switch 1s provlded for actuat'i n b? and the form here shown The switch comprises w 60 which is pivoted at filiand limi g pr e 2m een iasyhi hi e es e In the form shown n sive, support 60'; carr es adapted to-contact;w1th :-tatioiia terminals. llhe swinging-i support bl) isfpro spring leaf finger 71- carried 1b pivoted at 7 3: and slottediat l' pin 75 carried by lever-40, ,the'mo post 7 6 adjust-ableby 77 and'spring-7.8.-

- Insteadof relatiie In h v,

holder SOinto whichthe tenninals 6 66 respectively are led;agsuitableiquent t of mercury.i81-.being provideds-t minals when the block (iQ-is ineone ipositio The operation :is asfollows'zj a With the 'parts nornizillyatres 11a mospheric pressure withinthe two cl1anibers.-.

' flexed,, andilie a shortf distancefromgflthe i stops 21' and 22 respectivelygthe water valve 52 is closed; and the el'ectrioswitch is. closed, the motor being stationary, however, because one or the other 'of,the switches S, s, in the power circuit,14,- will be open, 1. The

gowercircu-it being closed through switches;

8, there will beproduced inthesystem high and low pressures which .will he com municated to. the two 7 chambers 21 and- :22,,

rzmqvememi et 11129 1 0 ,se r I oppos te directions; one ,upon each" lever; and" a.yi'elding.-connection between said. levers causing ..-'si1nultan'eous movement in either direction j-iwithin predetermined pressure limits 1 and1 i -perinitt1ng independent move;

mentof oneilever, relative to the other with-= 1n predetermined pressure limits. L

levers causing sii'nul'taneous hovement in In a PIQSSUZI'QfiOHjlflOl lOd 'dev e the combmation'ofalmmnbody hav ng two-pre'ssure chambers .t'ornxedin the opposed faces wsaid plu'ngers',

eithendirection within predetermined pres; sure limits and pernnttmg independent movement of one of the levers within predetermined pressure limits.

Q. In a, pressure controlled device, the COXIl- 1" BEST iBLE COPY a bin'ation of a main body havingtwo 'pressurechambers formed in the opposed faces.

thereof, two plungers, one associated with each ofsaid chambers, two levers, one associated witheach of said plungers, and a .yielding' connection between said levers causmg simultaneous movement 1n either direction within predetermined pressure limits and permitting independent movement of one ofthe leversjwithin predeter mined pressure limits.

5. In. a pressure controlled device, the

' combination of a main body having two I levers, one associated with eac pressure chambers formed in the opposed faces thereof, two plungers, one associated with each of said chambers,-a diaphragm between each chamber and its plunger, two

plungers, two overlapping connectors, one connected with each of said, levers,'and a spring. interposed between saidconnectors, said connectorsand spring forming a yielding connection between the levers causing permitting independent movement of one; of the levers within predetermined pressure simultaneous movement in either direction within predetermined pressure limits and limits.

6. In a'pressure controlled device, the combination of a main body having two pressure'chambers formed in-th-e opposed faces thereof, two lungers, one associated between said connectors, said with each of said 0 ambers, two levers, one associated with eachpf said plungers, two overlapping connectors, one connected with each of said levers, and a spring interposed connectors and' spring forming a yielding connection between the levers causing simultaneous movement in either direction within predetermined pressure limits and permitting independent movement of one of thelevers within predetermined pressure limits.

- 7. In a refrigerator machine, the combination of a compressor, a circulating system of said controlled by said compressor, a condenser I forming part of said circulating system, a motorfor said compressor, a valve for contro flow of acoolin'g medium relative to .sai condenser, a controller for the mov the otherof said levers acting upon the controller.

8. In a refrigerator machine, the combina tion of a compressor, a circulating stem contlql d by said compressor, a conenscr forming part of said circulating system, a motor for said compressor, a valvefor controlling flowof a'cooling medium relative to said condenser, a controller for the motor, a pair of opposed levers, a yielding connection between said levers requiring limited simultaneous movement in either direction, apair of pressure controlled elements one actin upon each of said levers in opposition to t e other, a pair of pressure chambers, one for each of said pressure controlling elements, a connection between one of said chambers and the low pressure side of the circulating system, and a connection between' the other of said chambers and the high pressure side of the circulating system, one of said levers acting upon the valve controlling the flow of cooling me dium and the other of said levers acting upon the motor controller substantially as described.

In witness whereof, I have hereunto-set my hand.

JONAS 'r. LAGERGREN. 

